Tested and proven in the field by Team RealTree and Nikon ProStaff members, the ProStaff series has an anti-reflective, fully multicoated optical system for up to 98% light transmission, improved color cna contrast, and maximized brightness. Features spring-loaded, zero-reset turrets and precise 1/4 MOA click adjustments. Nitrogen-filled o-ring sealed tube for 100% waterproof, fogproof protection. Like all Nikon scopes, the Prostaff series is protected by Nikon's exclusive Full Lifetime Warranty.